"""Tests for Dockerfile npm install line.

Covers issue #56 acceptance criteria:
- ``Dockerfile`` installs ``@mathew-cf/opencode-memory`` alongside
  ``opencode-ai`` and ``repomix`` in the global npm install step, so the
  memory plugin (``memory_save`` / ``memory_search`` / ``memory_list`` MCP
  tools) is available inside the container.
- ``opencode-ai`` is still present (regression guard — must not be dropped
  when editing the install line).

Checks are raw-text grep assertions (no Docker build needed), mirroring the
belt-and-suspenders style of ``test_docker_compose.py``.
"""

from pathlib import Path

REPO_ROOT = Path(__file__).resolve().parent.parent
DOCKERFILE = REPO_ROOT / "Dockerfile"

REQUIRED_PACKAGES = ("opencode-ai", "repomix", "@mathew-cf/opencode-memory")
MEMORY_PLUGIN = "@mathew-cf/opencode-memory"
OPENCODE_AI = "opencode-ai"


def _dockerfile_text() -> str:
    """Read Dockerfile text (asserts the file exists)."""
    assert DOCKERFILE.exists(), f"Dockerfile missing: {DOCKERFILE}"
    return DOCKERFILE.read_text()


def _npm_install_lines(text: str) -> list[str]:
    """Return every ``npm install -g ...`` line from the Dockerfile."""
    return [line for line in text.splitlines() if "npm install -g" in line]


# ── file exists ─────────────────────────────────────────────────────────────


def test_dockerfile_exists():
    """Dockerfile exists at repo root."""
    assert DOCKERFILE.exists(), f"Dockerfile missing: {DOCKERFILE}"


# ── @mathew-cf/opencode-memory installed (issue #56 — the required plugin) ───


def test_memory_plugin_in_npm_install():
    """Dockerfile installs ``@mathew-cf/opencode-memory`` via ``npm install -g``.

    Without the plugin the memory MCP tools (``memory_save`` /
    ``memory_search`` / ``memory_list``) are unavailable — opencode silently
    skips the uninstalled plugin referenced in opencode.json.
    """
    lines = _npm_install_lines(_dockerfile_text())
    assert lines, "no `npm install -g` line found in Dockerfile"
    assert any(MEMORY_PLUGIN in line for line in lines), (
        f"Dockerfile must install {MEMORY_PLUGIN!r} via `npm install -g` — "
        "memory plugin MCP tools depend on it"
    )


def test_memory_plugin_in_npm_install_raw():
    """Raw text check: the Dockerfile contains ``@mathew-cf/opencode-memory``.

    Belt-and-suspenders alongside the parsed check — catches edge cases where
    the line collector might miss a multi-line or differently-formatted
    install statement.
    """
    assert MEMORY_PLUGIN in _dockerfile_text(), (
        f"Dockerfile must contain {MEMORY_PLUGIN!r} so the memory plugin loads inside the container"
    )


# ── opencode-ai still present (regression — must not drop the main package) ──


def test_opencode_ai_present():
    """Dockerfile still installs ``opencode-ai`` (regression guard).

    Editing the npm install line to add the memory plugin must not
    accidentally drop the primary ``opencode-ai`` package.
    """
    lines = _npm_install_lines(_dockerfile_text())
    assert lines, "no `npm install -g` line found in Dockerfile"
    assert any(OPENCODE_AI in line for line in lines), (
        f"Dockerfile must still install {OPENCODE_AI!r} — dropping it breaks "
        "the container entrypoint"
    )


def test_opencode_ai_present_raw():
    """Raw text check: the Dockerfile contains ``opencode-ai``."""
    assert OPENCODE_AI in _dockerfile_text(), f"Dockerfile must still contain {OPENCODE_AI!r}"


# ── single npm install line holds all three packages ────────────────────────


def test_single_npm_install_line_has_all_packages():
    """One ``npm install -g`` line installs all three required packages.

    Guards against splitting the install across multiple RUN layers (which
    would waste image layers and obscure which package is missing).
    """
    lines = _npm_install_lines(_dockerfile_text())
    install_lines = [line for line in lines if OPENCODE_AI in line]
    assert install_lines, f"no `npm install -g` line with {OPENCODE_AI!r}"
    main_line = install_lines[0]
    for pkg in REQUIRED_PACKAGES:
        assert pkg in main_line, (
            f"package {pkg!r} missing from the opencode-ai npm install line: {main_line!r}"
        )


if __name__ == "__main__":
    import pytest

    pytest.main([__file__, "-v"])